"There are few compelling reasons for most PC purchasers to pay more money for less storage than they can get using an HDD, so In-Stat expects HDDs and Hybrid Drives to continue to outweigh SSDs in these applications for at least the next several years," says Jim McGregor, In-Stat analyst, in a prepared statement. "Nevertheless, SSDs' advantages in lower power, higher reliability, lower noise, and faster access than HDDs, in an extremely durable unit, make for rapid growth in some markets, especially in military and industrial UMDs."
Ruggedized devices are screaming for SSDs. They will be far more reliable under stressful working conditions than conventional hard drives. And the power savings are key. Spinning up hard drives to dig out information is costly to battery life.
Aside from UMPCs, I'd also like to see larger solid state drives in smartphones. Many come with limited internal storage (less than 64 Mbytes) and users have to opt for external miniSD or microSD cards for additional storage. While the external option isn't a bad one, it wouldn't hurt to see more generous drives built-in, especially as prices come down.